646068096 has 128 divisors (see below), whose sum is σ = 2007360000. Its totient is φ = 204000768.

The previous prime is 646068089. The next prime is 646068131. The reversal of 646068096 is 690860646.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60745 + ... + 70583.

It is an arithmetic number, because the mean of its divisors is an integer number (15682500).

Almost surely, 2^646068096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646068096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003680000).

646068096 is an abundant number, since it is smaller than the sum of its proper divisors (1361291904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646068096 is a wasteful number, since it uses less digits than its factorization.

646068096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881 (or 9863 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 646068096 is about 25417.8696196200. The cubic root of 646068096 is about 864.4889208079.

The spelling of 646068096 in words is "six hundred forty-six million, sixty-eight thousand, ninety-six".